進展抵抗の不規則性を考慮したクリープき裂伝ぱ過程に対する確率論的考察

概要

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A stochastic approach to creep crack propagation is proposed in consideration of random propagation resistance. It is based on a propagation law of small creep cracks. Throuth adding the Gaussian white noise to propagation resistance of the propagation law, a stochastic differential equation of Ito type is derived. This stochastic differential equation play an important role in ours stochastic propagation approach. A sample path and life distribution of creep crack propagation are derived according to the approach. Thses theoretical results are compared with the experimental data type 304 strainless steel.
1985-09-15